You will need 1 x 100 BR gift card from CDKeys for £13.99, game currently priced at £17.99 on UK Xbox Store.
Please note a VPN is required for redeeming the gift cards on the Brazilian Xbox Store and purchasing the game only, the Tunnel Bear extension in Google Chrome may be used for free. Please note a VPN does not need to be enabled when purchasing from CDKeys.
1) Enable Tunnel Bear extension in Google Chrome, set region to Brazil and activate.
2) Go to redeem.microsoft.com/
and log in using your MS/Xbox account. You will need a Brazilian address on your MS account if you don't have one set up already
3) Redeem purchased codes.
4) Continue to purchase game from Xbox store as normal.
Game will then be in your usual box console library to download.